Optimal phase estimation for qubit mixed states
Quantum Physics
2007-05-23 v3
Abstract
We address the problem of optimal estimation of the relative phase for two-dimensional quantum systems in mixed states. In particular, we derive the optimal measurement procedures for an arbitrary number of qubits prepared in the same mixed state.
Cite
@article{arxiv.quant-ph/0411133,
title = {Optimal phase estimation for qubit mixed states},
author = {Giacomo Mauro D'Ariano and Chiara Macchiavello and Paolo Perinotti},
journal= {arXiv preprint arXiv:quant-ph/0411133},
year = {2007}
}
Comments
revised version accepted for publication